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and subject line Bug#166413: mga driver doesn't set gamma on second screen
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Date: Fri, 25 Oct 2002 18:10:23 -0700
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Subject: mga driver doesn't set gamma on second screen
Message-ID: <20021026011023.GA20011@debian>
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Package: xserver-xfree86
Version: 4.2.1-3
I added a:
Gamma 1.8
to my XF86Config-4 file and upon restart it was obvious that my primary
monitor had it's gamma set to 1.8, but the secondary one was still set
to 1.0 even though the X log and xgamma claimed it was set at 1.8
Setting any gamma with xgamma on the second screen has no effect. This
is on a matrox G450 dualhead with 2 identical ViewSonic P810 21" monitors.
-Brett Carter
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Date: Mon, 28 Oct 2002 21:27:06 -0500
From: Branden Robinson <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
Cc: Jeffrey Baker <[EMAIL PROTECTED]>, Marc Wilson <[EMAIL PROTECTED]>,
Michel D?nzer <[EMAIL PROTECTED]>
Subject: Re: Bug#166413: mga driver doesn't set gamma on second screen
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On Mon, Oct 28, 2002 at 12:29:21PM -0800, [EMAIL PROTECTED] wrote:
> On Mon, Oct 28, 2002 at 02:53:35PM -0500, [EMAIL PROTECTED] wrote:
> Hopefully this message will clear the air.
Thanks for following up.
> > Brett Carter says:
> > "After a quick reboot to windows, looks like the results are the same
> > there - you can't set the gamma on the second head."
>=20
> To clarify: Both in windows 98SE and X setting the gamma only sets it
> on the primary display. It looks to me like the hardware is crippled.
> I'll send a message to matrox tech support and see if they indeed can
> confirm this.
[...]
> Yes, I :cannot: set the gamma on the secondary head either in windows or
> X. I even flashed my card to the latest bios and driver under windows
> just to make sure. Go ahead and close this report as "not a bug".
Okay. Closing.
> > Brett has a Matrox MGA G400 AGP rev 130. That is the only model of card
> > that matters for this report.
>=20
> Umm, actually I've got a matrox G450 - their similar, but slightly
> different. Looks like linux's pci database needs to be updated, and
> lspci on my box returns:
> 01:00.0 VGA compatible controller: Matrox Graphics, Inc. MGA G400 AGP (re=
v 82)
No, all Matrox G450 cards show up as G400 cards. Michel D=E4nzer also
addressed this point. Also, I'll save someone the trouble of making
themselves look like an idiot, and invite them to interpret "82" as a
hexadecimal constant.
> But I know for a fact I've got a g450 (at least that's what the box
> says, and what windows reports).
The only way to tell a G400 from a G450 is with the PCI device revision
number.
> So to sum things up:
> 1. On a matrox G450, it looks like you can't set gamma on the secondary
> head due to a hardware limitation.
> 2. This bug can be closed as "not a bug"
> 3. It looks like there still might be an issue with the g400, which to
> my knowledge isn't a dual head card.
Okay. Anyone who actually has a software problem is welcome to file a
bug.
--=20
G. Branden Robinson |
Debian GNU/Linux | De minimis non curat lex.
[EMAIL PROTECTED] |
http://people.debian.org/~branden/ |
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